Just type height in the search bar
Sadly, but it seems that you can’t edit river/water levels.
Looks like you need to just remove all water…
You can remove rivers and keep water only in one level, but it’s a bit hard to do. Need to:
- Remove Water entity.
- Add some spawner (triggers could be used) that will respawn Water entity.
- Edit Water entity in entities.blk. Set water__level that you want to see and e.t.c.